Porter was withdrawn by his father and trainer after two knock-downs in the 10th round. adidas alpha boost mens white Murray, who defeated Alcaraz at Indian Wells earlier this month, admitted being wary of the talented teenager, saying: "He's a great young player with a lot of potential. He hits a huge ball from the back of the court. He's an excellent player and I will need to play another good match if I want to win."Don't forget to follow us onskysports.com/tennisour Twitter account@skysportstennis adidas alpha boost mens white In the 27th minute, Biggar kicked Wales back into the lead when the Springboks were placed on a team warning for breakdown penalties after a fourth concession around their 22 - centre Damian de Allende failing to release after the tackle. adidas alpha boost mens white "I've only played in the Grand Slam once and it was a great tournament - I got to the quarter-finals. Just to get a taste of that will be nice, but I'm just happy with my game. adidas alpha boost mens white